2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 197Get this manual
ELECTRICAL GTurn the selector dial to the AC amps (A) positionGConnect the meter leads to the Yellow and YellowRed wires leading from the alternatorGStart the engine and let it idleReading should be minimum of 7A at idleNew Batteries: Batteries must be fully charged before use or battery life can be reduced by 10-30 of full potentialCharge battery for 3-5 hours at current equivalent of 110 of the battery's rated amphour capacity (i.e12amp hr .101.2 amp charging)Do not use the alternator to charge new batteryMaintenance-Free batteries are permanently sealed at the time of manufactureThe use of lead-calcium and AGM technology instead of lead-antimony allows the battery acid to be fully absorbedFor this reason, Maintenance-Free battery case is dark and the cell caps are not removable, since there is no need to check electrolyte levelNEVER attempt to add electrolyte or water to Maintenance-Free batteryDoing so will damage the case and shorten the life of the batteryRefer to the Battery Maintenance Video (PN 9917987) for proper instruction on servicing Maintenance-Free batteriesTo service Maintenance-Free battery: 1Remove battery from the vehicle 2Test battery with voltage meter or load tester to determine battery conditionThis will determine the length of time required to charge the battery to full capacityRefer to capacity table on Page 10.153Charge battery at 110 of its amphour ratingExample: 110 of 12 amp battery1.2 amp charge rate